The thing about paper ballots is that the ways to cheat with them are well-known ("finding" ballots in the trunk of a car, "losing" ballot boxes on the way to the counting center, counting the ballots behind locked doors with observers not present, and so on), and have been well known for centuries. So the counters to them (ballot boxes sealed with an official seal once full, only sealed ballot boxes will be opened and counted, neutral observers present at all times when ballot boxes are being transported and/or counted, and so on) are also well-known. If those anti-cheating counters are in place, that gives you quite a lot of trust in the results. And if observers get thrown out and then ballot counting continues behind closed doors, you can have a reasonable suspicion that cheating is going on, and can make a stink and demand a redo of the vote.
With Internet voting, the ways to cheat are not all that well-known among the general population, and even among an audience like HN I bet we couldn't come up with all the ways to cheat. (That's not a challenge!) So there's going to be fundamentally less trust in the election process than with paper ballots, even if the Internet-voting system was actually made completely secure. (And I'm not persuaded it can be made completely secure, given that secret ballots are a fundamental requirement of the process).
So yes, paper ballots are very much the way to go.